International. Nanochitosan was prepared by Malaysian scientists to act as a nanofill reinforcing agent that had been incorporated into a protective coating for corrosion protection using high molecular weight chitosan.
A series of epoxy resin-based nanocomposite coatings with various nanochitosan charge indices (NCH) were prepared and applied on mild steel substrates under environmental conditions.
Surface morphology and structural characterization of NCH and nanocomposite coatings were carried out using field emission scanning electron microscope (FESEM), X-ray diffraction (XRD) and Fourier transformed infrared spectroscopy (FTIR).
The optical characterization of the nanocomposite samples was examined by UV-vis spectroscopy at a range of 300-800 nm in transmission mode. Thermal analysis was employed using differential scanning calorimetry (DSC) and thermogravimetric analysis (TGA). The corrosion protection yields of nanocomposite-coated mild steel substrates were studied comparatively using electrochemical impedance spectroscopy (EIS).
The results showed that the entire coating of epoxy resin-based nanocomposites containing NCH significantly increases anticorrosive properties. The addition of 0.5% nanochitosan exhibited the best overall performance.
Source: https://www.sciencedirect.com
